Rheumatoid arthritis (RA) is an autoimmune disease, a disease in which the immune system mistakes the body's own cells for invaders. In RA, the immune system attacks the synovia, the membranes lining the joints.

Muscular dystrophies are a group of diseases that cause damage and weakness to muscles over time. This damage and weakness is caused by the lack of a protein called dystrophin, which is necessary for normal muscle function.

Cerebral palsy is a disorder of muscle movement and coordination caused by an injury to a child's brain that occurs before birth or during infancy. It affects the part of the brain that controls body movement. Other problems are seizures, decrease...

Marfan syndrome is an inherited connective tissue disorder that affects normal body growth. Connective tissue provides the support for the skeletal structure and all organs of the body. Any disorder that affects your connective tissue (such as Mar...